你是我的大世界ZZ你是我的小宇宙AA
[nĭ shì wŏ de dà shì jiè zz nĭ shì wŏ de xiăo yŭ zhòu aa]
A unique expression to describe a person's importance to the narrator. You (addressing someone specifically) are not only the large world but also the small universe to him/her.